Diuretics Flashcards
What is the class for Acetazolamide (Diamox)
Carbonic anhydrase inhibitors
What is the mechanism for Acetazolamide (Diamox)
Inhibits luminal carbonic anhydrase at proximal tubule –> less activity of Na/H antiporter, decreased HCO3 and Na+ (and water) reabsorption
What are the therapeutics for Acetazolamide (Diamox)
Decrease intraocular volume/pressure and the prevention and treatment of mountain sickness
What are the important side effects for Acetazolamide (Diamox)
Increased K+ excretion and metabolic acidosis
What are the other side effects for Acetazolamide (Diamox)
Hepatic encephalopathy, BM depression, skin toxicity, allergic reactions
What are the miscellaneous for Acetazolamide (Diamox)
Contraindicated in cirrhotic patients; FeNa = 5%
What is the class for Methazolamide (Neptazane)
Carbonic anhydrase inhibitors
What is the mechanism for Methazolamide (Neptazane)
Inhibits luminal carbonic anhydrase at proximal tubule –> less activity of Na/H antiporter, decreased HCO3 and Na+ (and water) reabsorption
What are the therapeutics for Methazolamide (Neptazane)
Decrease intraocular volume/pressure and the prevention and treatment of mountain sickness
What are the important side effects for Methazolamide (Neptazane)
Increased K+ excretion and metabolic acidosis
What are the other side effects for Methazolamide (Neptazane)
Hepatic encephalopathy, BM depression, skin toxicity, allergic reactions
What are the miscellaneous for Methazolamide (Neptazane)
Contraindicated in cirrhotic patients; FeNa = 5%
What is the class for Dichlorphenamide (Daranide)
Carbonic anhydrase inhibitors
What is the mechanism for Dichlorphenamide (Daranide)
Inhibits luminal carbonic anhydrase at proximal tubule –> less activity of Na/H antiporter, decreased HCO3 and Na+ (and water) reabsorption
What are the therapeutics for Dichlorphenamide (Daranide)
Decrease intraocular volume/pressure and the prevention and treatment of mountain sickness
What are the important side effects for Dichlorphenamide (Daranide)
Increased K+ excretion and metabolic acidosis
What are the other side effects for Dichlorphenamide (Daranide)
Hepatic encephalopathy, BM depression, skin toxicity, allergic reactions
What are the miscellaneous for Dichlorphenamide (Daranide)
Contraindicated in cirrhotic patients; FeNa = 5%
What is the class for Aminophylline
Bronchodilator (Methylxanthine)
What is the mechanism for Aminophylline
Phosphodiesterase inhibition and enhanced signalling via increased cAMP and cGMP; works at proximal tubule; decreased HCO3 and Na+ (and water) reabsorption
What are the therapeutics for Aminophylline
Reduce inflammation and bronchospasm in moderate to severe asthma, night symptoms; NOT as diuretic
What are the important side effects for Aminophylline
Larger doses give nausea, vomiting, CNS stimulation or seizures, tachycardia/arrythmias
What are the miscellaneous for Aminophylline
FeNa = 5%; aminophylline = theophylline + ethyelenediamine (solubility agent); metabolized by liver; cimetidine and quinoline increase blood levels
What is the class for Mannitol (Osmitrol)
Osmotic diuretic
What is the mechanism for Mannitol (Osmitrol)
Opposes water and sodium reabsorption at proximal tubule –> increased osmolarity of tubular fluid
What are the therapeutics for Mannitol (Osmitrol)
Increased clearance of drugs, minimize renal failure (shock or surgery), decrease intraocular or intracranial pressures, diagnose oliguria
What are the important side effects for Mannitol (Osmitrol)
Risk of pulmonary edema
What are the miscellaneous for Mannitol (Osmitrol)
FeNa = 5%; must give IV; other osmotic diuretics include glucose, urea, isorbide
What is the class for Furosemide (Lasix)
Loop diuretic (- charge)
What is the mechanism for Furosemide (Lasix)
Inhibits Cl portion of Na-K-2Cl cotransporter in luminal membrane at medullary and cortical (proximal) talH –> decreased K+, Ca++ and Na+ reabsorption, resultant K+ loss
What are the therapeutics for Furosemide (Lasix)
Crisis edema (pulmonary, CHF, cirrhosis), hypercalcemia, drug toxicity/OD; severe hypertension in setting of CHF or cirrhosis
What are the important side effects for Furosemide (Lasix)
Hypokalemia/hypocalcemia/hypomagnesemia (–> arrhythmia), contraction alkalosis, increased BUN & creatinine, ototoxicity (esp. w/aminoglycoside)
What are the other side effects for Furosemide (Lasix)
Hyper -glycemia, -lipidemia, -uricemia; hypo -magnesia, -natremia; gout, photosensitivity, nephrocalcinosis, drug interactions; erectile dysfunction
What are the miscellaneous for Furosemide (Lasix)
FeNa = 25%; eventually causes increase in PT reabsorption,decreases positive & negative free water clearance; decreases cortex-medulla molarity gradient; avoid NSAIDs, take before salty meals, reduce salt intake; useful in patients with renal insufficiency (GFR < 30-40)
What is the class for Bumetanide (Bumex)
Loop diuretic (- charge)
What is the mechanism for Bumetanide (Bumex)
Inhibits Cl portion of Na-K-2Cl cotransporter in luminal membrane at medullary and cortical (proximal) talH –> decreased K+, Ca++ and Na+ reabsorption, resultant K+ loss
What are the therapeutics for Bumetanide (Bumex)
Crisis edema (pulmonary, CHF, cirrhosis), hypercalcemia, drug toxicity/OD; severe hypertension in setting of CHF or cirrhosis
What are the important side effects for Bumetanide (Bumex)
Hypokalemia/hypocalcemia/hypomagnesemia (–> arrhythmia), contraction alkalosis, increased BUN & creatinine, ototoxicity (esp. w/aminoglycoside)
What are the other side effects for Bumetanide (Bumex)
Hyper -glycemia, -lipidemia, -uricemia; hypo -magnesia, -natremia; gout, photosensitivity, nephrocalcinosis, drug interactions; erectile dysfunction
What are the miscellaneous for Bumetanide (Bumex)
FeNa = 25%; eventually causes increase in PT reabsorption,decreases positive & negative free water clearance; decreases cortex-medulla molarity gradient; avoid NSAIDs, take before salty meals, reduce salt intake; useful in patients with renal insufficiency (GFR < 30-40)
What is the class for Torsemide (Demadex)
Loop diuretic (- charge)
What is the mechanism for Torsemide (Demadex)
Inhibits Cl portion of Na-K-2Cl cotransporter in luminal membrane at medullary and cortical (proximal) talH –> decreased K+, Ca++ and Na+ reabsorption, resultant K+ loss
What are the therapeutics for Torsemide (Demadex)
Crisis edema (pulmonary, CHF, cirrhosis), hypercalcemia, drug toxicity/OD; severe hypertension in setting of CHF or cirrhosis
What are the important side effects for Torsemide (Demadex)
Hypokalemia/hypocalcemia/hypomagnesemia (–> arrhythmia), contraction alkalosis, increased BUN & creatinine, ototoxicity (esp. w/aminoglycoside)